1980380256 has 48 divisors (see below), whose sum is σ = 5207328000. Its totient is φ = 659005568.

The previous prime is 1980380243. The next prime is 1980380263. The reversal of 1980380256 is 6520830891.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40285 + ... + 74723.

It is an arithmetic number, because the mean of its divisors is an integer number (108486000).

Almost surely, 2^1980380256 is an apocalyptic number.

1980380256 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1980380256 is an abundant number, since it is smaller than the sum of its proper divisors (3226947744).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1980380256 is a wasteful number, since it uses less digits than its factorization.

1980380256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35051 (or 35043 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 42.

The square root of 1980380256 is about 44501.4635264954. The cubic root of 1980380256 is about 1255.7876160558.

The spelling of 1980380256 in words is "one billion, nine hundred eighty million, three hundred eighty thousand, two hundred fifty-six".